Doctor controller for paper-machine driers



July 8 1924. v 1,500,952

' J. J. MALICKE DOCTOR CONTROLI JER FOR PAPER MACHINE DRIERS Filed March 24. 1925 jig; KL 7 v SVZIAJQ'H (0.x

Patented July 8, 1924.

UNITED STATES PATENT JOHN J. MALICKE, OF WISCONSIN RAPIDS, WISCONSIN.

DOCTOR CONTROLLER FOR PAPER-MACHINE DRIERS.

Application filed March 24, 1923. Serial No. 627,511.

T 0 all whom it may concern:

Be it known that I, JOHN J. MALIOKE, a

citizen of the United States, residing at Wisconsin Rapids, in the county of Wood ing rolls of paper making machines, that is of comparatively simple construction, and of such a nature to beassociated with the doctors of practically all types of paper making machines with which I am now familiar.

A further object of my invention is such a doctor controller that will effectively maintain the doctors into or out of engagement with the rollers.

The nature and advantages of the inven tion will be better understood when the following detailed description is read in connection with the accompanying drawings, the invention residing in the construction, combination, and arrangement of parts as claimed. In the drawings forming part of this application, like numerals of references indicate similar parts in the several views, and wherein v Figure 1-is a side elevation of my doctor controllerapplied to a paper making machine, and

Figures 2, 3 and 4are perspective of certain elements comprised in my improved controller.

Referring to the drawings in detail, and

particularly to Figure 1,5 indicates the usual drier cylinder of a paper making machine, 6 the doctor, 7 the doctor shaft, 8 one'of the end supporting standards for the shaft, and 9 a portion of the machine frame. Upon one end of the said doctor shaft 7, there is secured through the medium of set screws or the like 10, the head 11 of a hand lever 12.

Slidable within an opening in the machine frame 9, and preferably directly rear wardly of the said end of the doctor shaft 11, is a rod 13, the front end thereof being formed with a bracket 14, while the opposite end is screw threadedas at 15. Upon this screw threaded end of the rod is'an adjustable abutment 16, in the form of a nut and washer, and encircling the said rod between the machineframe and abutment is a coiled spring 17, the same adapted for normally maintaining the bracket 14 of the rod 13 in close contact with the said machine frame 9.

Pivoted at 18 to the bracket 14 of the said rod 18, is one end of a forwardly extending arm 19, the forward half of which is slightly offset as clearly shown in Figure 2. The

front end' of this arm 19 is formed with a laterally extending handle 20, the arm being also formed adjacent its pivotal end with a pair of spaced openings 21 for the selective reception of a lateral pin 22. Loosely, pivotally formed at the point 23 to the arm 19,

and at the point 24 of the said lever 12 is a connecting link 25, Figure 3, the same being also provided with a pair of openings 26 for the selective reception of a lateral pin 27 Between the pin 22 of the arm 19 and the pin 27 of the link 25, there is connected acoiled spring 28, the same adapted for maintaining the doctor 6 in close engage,- ment with the drier 5, when the elements are positioned as clearly shown in Figure 1.

In view of the above description, it will at once be apparent that when the elements are positioned as shown in this figure, the

doctor may be extended out of engagement with the drier 5 by merely pressing upon the handle 20 of the arm 19, this action swinging the arm downwardly upon its pivot 18 for effectively causing a swinging movement of the hand lever 12, at which time, the link 25 will assume a position substantially parallel with the arm 19 for consequently overcoming the tension of the spring 28. Should it ever be desirable to raise the doctor away from the drier for a shortperiod of time, the handle 12 may be manipulated in a direction toward the right, Figure 1, this movement of the lever pulling upon the link 25, for thereby pulling the arm 19, and in view of the specific connection of this arm to the machine frame 9, a swinging action of the lever will be permitted. Immediately upon releasing the arm 12, the spring 17' will return the elements to the position shown in Figure 1.

Although Ihave herein shown and described the preferred embodiment of the present invention, it is nevertheless to be understood that minorchanges may be madetherein, without departing from the spirit and scope of the invention as claimed.

Having thus described my invention, what ll claim as new, and desire to secure by Letters-Patent is:

1. In combination with a paper machine doctor, a lever keyed upon one end of the doctor shaft, an arm resiliently connected to the machine frame, a link connection between said arm and said lever, and means between said link, and said arm for main taining the doctor in an operative position.

2. In combination With a paper machine doctor, a lever secured to oneend of the doctor shaft, an arm resiliently connected to the machine frame and extending for- Wardly between the frame and the end of said doctor shaft, a link connection between the arm and said lever, a resilient connection between the arm and link at points upon opposite sides of the link connection to the arm, said spring adapted for maintaining said link out of parallel relation with the arm for maintaining the doctor in an operative position, said arm adapted to be depressed for completing the forward movement of the link for consequently extending said doctor vto an inoperative posiv tion. 7

In testimony whereof I affix my signature.

JOHN J 'MALICKE. 

